Fuel-feeding device



H. R. SAXON AND G. GA'NZERT.

FUEL FEEDING DEVICE.

APPLICATION FILED JUNE 11, 1917.

'1,36 1,621 a Patented Dec. 7, 1920.

2 SHEETS-SHEET 2.

a Celti/refer' UNITED STATES weer ortica.

HERMAN B. SAXON AND GEORGE GANZERT, 0F TLEDO, OHO, ASSI'GNORS, BY MESNE ASSIGNMENTS, T0 INDUSTRAL CORPQRATIQN. 0F TULEIDO, OHIO, il.

CURPORATION OF DELAWARE.

FUEL-FEEDIEJ'- DEVICE.

incliner.

Application filed June 11,

To all whom t may concern.'

Be it known that we, linearen Saxon and Geenen Glimmer, citizens of the United States, residing at Toledo, in the county of Lucas and State of Ohio, have invented certain new and useful Improvements in Fuel- Feeding Devices, of which we declare the 'following to be a full, clear, and enact description.

This invention relates to improvements in fuel feeding devices for automobiles, of the type embodied. in our co-pending application filed lune 11, 1918, Serial Number 174107. The present invention relates particularly to devices of the type which are operated by the suction. existing in the in take manifold of the engine, when ruiming, to lift fuel from a main fuel tank to an auxiliary vacuum tank1 from which, the fuel feeds to the carburetor.

rll`he principal object of our invention is to provide an improved valve action for con trolling the connections between the vacuum tank and the atmosphere and the source of suction. A further object of our invention is to provide an improved. vacuum tank construction, of such a nature that it can be produced. in large quantities at a low cost and can be readily and conveniently assembled.

Further objects, and objects relating to economies of manufacture and details of construction, will definitely appear from the detailed description to follow.

`We accomplish the objects of our invention by the devices and means described in the following specification. @ur invention is clearly defined and pointed out in the appended claims.

Ei structure constituting a preferred embodim nt of our invention is illustrated in the accompanying drawing, forming a part of this specification, in which:

Figure l is a diagrammatic view of our improved vacuum. tank, connected to the main fuel tank, the engine and the carbureter.

Fig. ll is a vertical, sectional view through a vacuum tank constructed in accordance with our invention.

Fig. .lll is a fragmentary view, partly in section and partly in side elevation, showing the valve mechanism with the valve in position opening the connection with the at- Speccation of Letters Patent.

4Patented Dec., 7, 1929.

191'?. Serial No. 174,1023.

mosphere and closing the connection with the suction means.

Fig. IV is a fragmentary view in side elevation, of a portion of the valve operating mechanism, with the valve in position opening the suction means and closing the connection with the atmosphere.

Fig. V is a fragmentary view, similar to Fig. lV but .showing the valve mechanism in the position shown in Fig. lll.

Fig. Vl is a detail, sectional view, taken substantially on the line Vl-Vl of Fig. ll.

Fig. VH is a vertical, sectional view taken through a vacuum tank embodying a modified form of our invention?.

Fig. VIII is a view in side elevation showing the valve operating mechanism.

Fig. IX is a vertical, sectional view, taken substantially on the line :iX- lli of Fig. Vlll. L

ln the drawings, similar reference numerals refer to similar parts throughout the several views, and the sectional views are taken looking in the direction of the little arrows at the ends of the section lines.

Considering the numbered parts of the drawings, it will be seen that our fuel feeding system comprises a vacuum tank 10, which is connected by the conduit 11i with the main fuel supply tank 13. The vacuum tank is connected with the intake of the engine 15, preferably at a point between the carburetor and the intake manifold, by means of a suction conduit 16, and is also connected with the carburetor 17, by means of the fuel supply conduit 18.

Our vacuum tank comprises a float chamber 19, and an auxiliary chamber 20, from which the fuel feeds by gravity to the carburetor. The diameter of the auxiliary chamber 2O is slightly less than that of the float chamber 19, and said chamber 20 is provided at open upper end with the laterally extending ligure 23, on which is disposed the gasket 2d, on top of which rests the bottom of the main float chamber 19, as clearly appears from Fig. ll of the drawing. The main float chamber is provided with a cover 25, there being a gasket 26 interposed between the top flange of the chamber 19 and the cdver 25. rlfhe stem 27 is disposed axially of the chamber 19, with its being threaded, the elbow 28, connected to the suction conduit 16, being screwed on to the upper threaded end of said stem, as appears from F ig. Il. A T-coupling 29 is screwed on to the threaded lower end of the stem 27, below the bottom of the chamber 19. Nut 30 is screwed on to said threaded lower end of stem 27, above the bottom ot the chamber 19, so that the bottom of the chamber is securely clamped between the nut 30 and the T-coupling 29. Stem 33 is threaded vinto the lower end of the T-eoupling 29, the

lower end of said stem extending through the bottom of the auxiliary chamber 20, and the elbow 34, which is connected by the conduit 18 with the carburetor 17 is threaded on to the lower end of the stem 33, outside of the bottom of the auxiliary chamber 20. btu-l 35 extends through the cover 25 and the elbow 36 is threaded on to the upper end of said stud, to which elbow the fuel supply conduit 14 is connected.

Passages 37 and 39 are provided in the upper end of the stem 27, the lower entrance to each of said passages being through the side of the stern, as appears from Fig. Il ot Afloat.

the drawing. Opening 38 is provided in the side of the elbow 28, in position to be alined with the upper end ot the passage 39, as appears from Fig. II. lt will be seen that by means of these passages, a connection may be made between the chamber 19 and the suction' means, or between the chamber 19 and the atmosphere. A passage 40 is provided in the stud 35, through which fuel is delivered from the fuel supply passage 14 to the main float chamber 19.

The sleeve valve 43 is slidably mounted on the stem 27 and provided with the lower flange 44, and the upper flange 45. A, stop pin 46 is carried by the upper end ot stem 27, in position to limit the upward movement of the sleeve valve 43. The entrances to the passages 37 and 39 are so disposet and spaced relative to each other, that said sleeve valve 43 will, in its lower position, cover the entrance to the passage 39, and, in its upper position, will cover the entrance to the passage 37.

Float 47 is provided with a central opening therein, in which are fixed the upper flange 48 and the lower 'flange 49, which torni a bearing for the float on the stem 27, said iianges being connected together by tie bolts 50 passing through the ilanges and the A slot 53 is provided in the lower end ot the stud 35, and lever arms 54, the main parts of which extend on opposite sides of the stem 27, have their outer ends bent toward each other and disposed in the slot 53, being secured therein by pivot pin 55 passing through the stud 35 and through they ends lof said lever arms 54` The ends ot said lever arms areprovided with the openings 56, and hooks 57, are secured to the iange 48 of the lloat, at diametrieally opposite points thereon, said hooks having the laterally turned portions 5S, which are disposed within the said openings 5o. The levers 54 carry the laterally extending pins 59, and a stud GO is secured to the cover 25 andA extends downwardly within the float chamber, said stud carrying a laterally extending pin 63. `Springs G4 are connected at one end to the pin 63, and at the other end to one ot the pins 59 carried b v the lever arms A transverse passage (l5 is provided in the lower end of the stein 27 and communicates with a axial passage GG and the passage G7 termed in the T-coupling 29. rl`he nipple GS is screwed into the horizontal arm of the coupling 29 and provided with a passage G9 so that tuel may tlow troni the tioat chamber through the passages 65, G7 and 69 to the auxiliary chamber,

A ball is disposed in the passage (37. forming a non-return valve permitting the fuel to flow from the 'loat chamber 19 to the auxiliary chamber 20, but preventing the flow of the tuel iu the opposite direction. :i stem is screwed into the lower end ot' the T-coupling 29 and provided with a transverse passage 73 and an axial passage 74, communicating with the nipple 34. to which is connected the fuel supply passage 18 leading to the carbureter, so that fuel mav flow from the chamber 2O through the pas-- sages 73 and 74 to the conduit 18.

A vent tube 75 is disposed within the chamber 19, the lower end ot said vent tube being connected with the opening 7G. in the bottom of the chamber 19, and the upper end o1" said vent tube, being connected with the opening 77, in the side wall ot the chamber 19, near the top thereof, so that the auxiliary chamber 2O is always maintained under atmospheric pressure and `fuel will Aflow therefrom by gravity to the carbureter at all times.

The embodiment ot our invention .shown in Figs. Vil, Vlll and lli is the same in all its essential particulars, as that shown in Figs. l to Vl inclusive, with the exception that, in this embodiment oi" our invention, we do not employ an auxiliary chainber 2O from which the -fuel flows to the carbureter. A small vent SG provided in the cover 25, which vent is considerably smaller than the pafsage 37 by means ot which the chamber 19 is connected wth the suction means, and, in this 'form ot our invention, the chamber 19, is continuously open to the atmosphere through the small vent 8G. The e bow 78 is screwed on to the lower end ot the stem 27 and provided with a passage 79 tl erein. rlhe elbow carriesl the nipple 83, connectzd to the conduit 18 leadin;T to the carbureter, and a brll valve 811: is disposed in the passage 79, and is adapted to contact with or seat in the restricted porllO 1,361 ,cai

tion of the passage 79, permitting fuel to flow from the chamber 19, but preventing any iiow in the opposite direction. A removable plug 8O is provided in the elbow 78, through which the fuel may be drained therefrom and access may be had to the valve seat in order to clear the same. lt will be obvious that, in this torni ot our invention, the vent tube is not needed and for that reason it is omitted. In other re spects, this Yform of our invention is the same as shown in Figs. l to VI inclusive.

F rom the description oi the parts given above, the operation of our device should be very readily understood. In assembling the parts of the vacuum tank, the chambers 19 and 20 are formed separately and a stem 33, with the nlcoupling 29 attached thereto is inserted through the opening` in the bottom of the auxiliary chamber 20, and the elbow 34; is screwed on to the lower end of the stem 33. The main float chamber 19 is then seated with its bottom resting on the gasket 2l, carried by the i'lange 23, ot the auxiliary chamber 2() and the stem 27 is in serted through the opening in the bottom oi" the chamber 19 and threaded into the 'l'- coupling 29, the nut 30 being tightened to clamp the bottom of the chamber 19, between the end of the T-coupling 29 and the nut 30. rlhis draws the bottom oi the chamber 19 into tight iitting engagement with the gasket 211, so that the chambers 19 and 2O are firmly secured together. The iloat 417 is placed on the stem 27 and the cover is placed on the chamber 19, the sleeve 13 being slipped over the stem 27, after which the pin 16 is inserted, to prevent the removal oil the valve operating mechanism. T he elbows 28 and 36 are then screwed on to the upper ends of the stem 2'? and the stud 35, respectively and these serve to hold the cover 25 in tight iitting engagement with the top edge of the chamber 19. l`he elbow 28 connected with the intake manifold of the engine 15 by the conduit 16, as has already been described, and the chamber is always in communication with the main iiuel tank 13, through the conduit 11i, which opens into the passage l10 in the stud 35. When the parts are in the position shown in liig. l1 oi the drawing, chamber 19 is in communication with the intake manifold of the en and closed to the atmosphere, since the sleeve valve 13 closes the lower end of thc passage 39 which connects with the atmosphere and forms an air vent for the chamber 19. Suction existing in. the intake mani- :told of the engine will thus cause a partial vacuum in the chamber 19 and, since the fuel in the main iuel tank 13 is under atmospheric pressure, the fuel will be lifted throuc'h the conduit lll and flow through the passage il() into the chamber 19. As the fuel iows into the chamber 19, the float 47 will of course be lifted. Vlhen the iioat has risen a predetermined distance, the laterally turned ends 58 ci the hooks 5i', engage the upper edges of the openings 56, in the heads of the lever arms l, and swing said levers upward on their pivot 55, carrying the springs 64C 'from the position shown in liig. lll to that shown in iig. Y and lifting the .sleeve valve 4t?) so that it uncovers the lower end of the passage 39 and covers the lower end or' the passage Si'. ln that case, the chamber will be placed in communicttion with the atmosphere through the port 38 and will. be closed to the suction means since the passage 3i' is closed. 1t will be seen that, in the position shown in l? ig. lll, the sleeve valve held in its lower position, the springs G4; tending to dra-w the lovers 541. downwardly, while, when the springs are in the position shown in ll1 ig. V, the

tend to draw the levers 511 upwardly and hold the sleeve valve in engagement with the stop pin 16. 'lheopenings 56 are quite large so that there will be a considerable movement of the float i7 without affecting the lever arms to throw them from one position to the other. By this means, we secure an intermittent action ci the valve operating mechanism due to 'the rising and lalling ci the float as the fuel is intermittently 'ted into the chamber 19 and i-ed from the chamber 19 to the auxiliary chamber 20.

lllhen the sleeve valve is in the position shown in Fig. lll., atmospheric pressure exists in the chamber 19, and henre fuel will no longer iiow from the main ituel tank into the float chamber. is atmospheric pressure is restored in the float chamber 19, the iucl therein will low by gravity past the cliecl". valve formed by the ball 70 to the auxiliary chamber 2l), so that, when the suction is cut olf, the atmospheric pressure exists in the float chamber 19, the fuel flows naturallyv into the auxiliary chamber 2O to maintain the supply therein. After the Jfuel has ted from the float chamber 19 suiiiciently to perw mit the float to drop a predetermined distance, the ends 58 ot the hooks 57 engage the lower edges ci the openings 56, and throw the lever arms from the position shown in. V to the position shown in Fig. lV, thus bringing the .sleeve valve 49 to its lower position, connecting the chamber with the suction means and cutting it oli' from the atmosphere.

The auxiliary chamber 2O is always maintained under atmospheric pressure due to the vent tube 7 5 which connects the cham ber 20 with the atmosphere, the upper end of said vent tube being always above the level of the fuel in the float chamber 19, and hence -fuel will flow by gravity as needed from the auxiliary chamber 2O to the carburetor.

In Figs. VH, V111 and lli we have shown ieiueai i llize free ends i '.3 ti 1 verse L' 3 adapted to engage the flanges of Qiid sleeve val ve; hooks carried by said float and haringlg' laterally turned ends disposed in said openings; a i i, cd by said tank; and liavi, 3' pin; springs connected with said pin and the p is on said levers; and a one-way coni l,tion leading;- ifroni said tank.

l0. ln device of the class described, the combination of a tank; a stem disposed in said tank and having ijiassages connecting said tank with the atmosphere and a source of suction respectively; a float slidably mounted on said stem; a sleeve valve slid-- ably mounted on said stem; and lian/'ing` a pair of flanges; a stud carried by the top o t' said tank and having a passage connected with a supply of fuel; levers fulcrumed in said stud and extending on either side of said stem, said levers having` enlarged oponings in the free ends thereof; and carrying train-averse pins adapted to engage the flanges of said sleeve valve; and hooks carried by said float, having; laterally turned ends disposed in said openings.

ll. ln a device of the class described, the combination of a tank; a stem disposed in the tank and having` passages connecting said tank with the atmosphere and a source of suction respectively; a fuel supply con nection for said tank; a float slidably mounted on said stem; a sleeve valve slidably mounted on said stem and having a pair of flanges; suitably fulcrumed levers entending1 on either side of said stem, said levers having' enlarged openings in the free ends thereof; and carrying` transverse pins adapted to engage the flanges of said sleeve valve; hooks carried by said float and having' laterally turned ends disposed in said openings; and a one-way connection leading from said tank.

l2. ln a device of the class described, the combination of a tank; a stem disposed in said tank and having; passages connecting said tank with the atmosphere and a source of suction respectively; a fuel supply connection for said tank; a float slidably mounted on said stem; a sleeve valve slidably mounted on said stem and hai/*ina a pair of flanges; suitably fulcrumed leversI extending on either side of said stem; said levers having` enlarged openings therein and transverse pins adapted to engage the flanges of said sleeve valve; connections between said float and said levers, movable in said openings to permit a limited movement of the at in either direction without affecting d lover; and a. one-way connection leadfrom said tank. in a device of the class described, the combination of a tank; a stem disposed in said tank; and'having` passages connectingv said tank with the atmosphere and a source of suction repec-tively; a float slidably mounted on said stem; a sleeve valve slid ably mounted on said ste-ni; suitably fulcri id levers extendingon either side of said stein; connections between said levers and said sleeve valve and between said levers and said Afloat, said last-named connections being such as to permit a limiter niovenient of the float without affecting` said levers; and a one-way connection leading from said tank.

l-k .ln a device of the class described, the combination of a tank; a stem disposed in said tank and having passages connecting said tank with the atmosphere and sour :e of suction respectively; a fuel supply connection for said tank; a float in said tank; a sleeve valve slidably mounted on said stem and controlling said passages; spring` controlled connections between said ioat and said valve; said connections being" such to permit of a limited movement of the float without affecting the valve; and a one-way connection leading from said tank.

l5. ln a device of the class described, the combination of a tank; a stem disposed in said tank and having passages connecting said tank with the atmosphere and a source of suction respectively; a fuel supply connection for said tank; a float in said tank; a sleeve valve slidably mounted on said stem and controllingsaid passages; a suitably fulcrumed lever; connections between said lever and said sleeve valve and between said lever and said float of such a nature as to permit of a limited movement of said Heat without affecting said lever; and a one-way connection leading1 from said tank.

16. lin a device of the class described, the combination of a tank; a stem disposed in said tank, and having passages connectingv said tank with the atmosphere and a source of suction respectively; a fuel supply conu nection for said tank; a float disposed in said tank; a sleeve valve slida-bly mounted on said stem; a fulcrumed lever in said tank; said lever having an enlarged opening in the free end thereof; a connection between said lever and said sleeve valve; and an upwardly extending arm carried by said float and having,l a laterally turned end disposed in said opening.

i7. lin a device ot the class described, the combination of a tank having a fuel supply connection; a stem disposed in said tank, and provided with passages connecting said tank with a source of suction and the atlilo llt

mosphere respectively; Valve mechanism for controlling said passages, Said stein having also a passage connecting said tank With the carbureter; a non-return valve disposed in said last-named passage; and an atmospheric vent in said tank, or" much smaller cross section than the passage connecting' said tank with the source of suction.

18. In a device of the class described, the combination of a tank, continuously open to the atmosphere; a fuel supply connection; a stem disposed in said tank, provided with passages connecting said tank With. the atmosphere and With a source oi suction respectively; valve means for controlling said passages; and a connection between said tank and the carbureter provided with a non-return valve therein.

19. ln a device of the class described, the combination of a tank, continuously open to the atmosphere, and provided with a fuel supply connection; connections between said tank and the atmosphere and a source of suction respectively; float operatedv valve means for intermittently controlling said last named connections; and a passage con` necting said tank with the carbureter, provided With a non-return valve therein.

n testimony whereof we aliiX our signatures.

HERMAN R. SAXON. GEORGE GANZERI. 

